Indiana Code Title 22. Labor and Safety § 22-6-6-3

(1) a law that permits agreements that would require membership in a labor organization;

(2) a law that permits agreements that would require the payment of dues, fees, assessments, or other charges of any kind or amount to a labor organization;  or

(3) a law that permits agreements that would require the payment to a charity or a third party of an amount that is equivalent to or a pro rata part of dues, fees, assessment, or other charges required of members of a labor organization;